Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2189d031aeaf2a16ba03c8978e8d4f71335bc04fc52762fc281bef9ea574c2b' 
  AND token = 'JT0o98JQPyrLRnjftVgEhsSgPS1tVQs3TJP0A00sjWU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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