SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de45587900b513bb5b028da6703b1ffcfe097378bfdf61d8767ec13476449023' 
  AND token = 'HVRO1W9yMnHwW5VEiAgKQy/oqTvbr2Pka+EhBlSVcF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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