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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '245b4b92633baf7b27ef2f91a2447c2caa9e97f5dfb584391d21e23fb67cd29e' 
  AND token = 'OdYDGOhuMLmjRmqsynHKcwt2wA8dYcYouw3Coed9P5A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}