Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2e4480e8885314fb7790ad0f84fe3a931e2c99a68dd359f8678a03cb14043dc' 
  AND token = 'L3THxcYRXpPUhR2BK9cieVBiB7930VJCI6wK4H7xeyo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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