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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26ef92e9dcf18316bf01dac5e08185feeb732215dda505f59495020e5fae35dd' 
  AND token = 'HRA7jaOZw9/zDyXJ72mQ/s7V3JWoGbWhQaooL0hJAd0=' 
  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"
    }
  }
}