Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cfb72f4717749097b548cbdb004f9d4c6b65485558474e15fca2862b90368171' 
  AND token = 'TZOLmrRIuzoqlPYEAYkt/mdkeQ5+46waPchS+2lXp68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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