Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a43c95b364665577a9a74d5ef164241b3636044f3a3ede1e0c993b030699bcee' 
  AND token = 'X2z5cYOSdsmNPfJLo4Q0Z6B0r+ZvvvdVjxK0V5vAQO0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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