Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d2ae894bdf11a31057f2fe1a1f6620f711f35127420ae99c6fdb860b7ab9824' 
  AND token = '0dHzdOaiLihTTk4rTsqWrJedMCTC4ZCvKDDQNWQJPA0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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