Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb04a73e2d598b307970db9353ab2573329bdd2744cd274711392e01ef9c0bee' 
  AND token = 'C4fZHxhE3scNg8hkw2xrLe0kNBkFoV+ThAeFx133tSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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