Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'debf2e34e873b0cdf2167901dbaca23a1c6efa3873192ec0039ca5e0f1758861' 
  AND token = '+a6Nnb4vFY2jhsFZemXxXJy5PEMdJ7pf38FpSUcckvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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