Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1c4d0f3edeae09865d10e421506838effaecfa81ecde8cf44e20c883ba58d84' 
  AND token = 'JWxa3AKyKUeH0d+VvR1Hzzv9NsBunrjqIfbGhJ2SHnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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