Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f915276af182af0015b2d5dd44463912e61cad2cd6abc0ae399f9c014e31427' 
  AND token = 'RW8qnvahF2hq+UQiA1doVTkWNJH9yWhWNgoQJTwcGMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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