Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa424ad4ff27297c3e6cd7a2fe972edd00cb246da0bcee0ef217800a381099ff' 
  AND token = '+P56PluM3UlDzWXS3ScC2BI6NngNmfpRMP0eU8wAbV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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