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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c69d87288cdba4d46e03c7324511a591f68948fef4e62ed10ee57ca388616fe' 
  AND token = '1qm8vPeelpWne6B/D1l7cuknhde4LYKIriVoWsq8rH0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}