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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92bb93a0ac4e44acba944ba28f35dd620070611364e13ce18c2b367ba5a34ae9' 
  AND token = 'Sr/DIhDIKAL9PVig+f80zN9iiVIfYd35PBhZRx81b3E=' 
  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"
    }
  }
}