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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '253c6538c5af81cc281a2dc5a8b2dea43e67bfe8f6dffcfab74576a8c96713d2' 
  AND token = 'YWG4e37va6lBkOoj0n3M1V/aTxt85zaQ2Qz8DK5pDWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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