Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '327a0c5b1c2b98e5de2c1e0483fc507d37e4387c58d4a64d2be34aa6af6f654e' 
  AND token = 'iZxH1MJZBSfFH7ccEFO7Q5vysQmoA/Ftn3ZjKKBxDFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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