Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d191f264104a8465202e7cacc4f146fe6f7df42a6b8f9f45811e0967fcff83b' 
  AND token = 'AsIApDfUYMJ0r6rd83n6b6yAreodzsqpGWKTD5mqznc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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