Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e0a5684142a2eb98b1402892a3006a9d9729929678e4ab35e54e1c5e54029fb' 
  AND token = 'EA7HIwET3FPpsgYtWkZQXYlSx5SDEgdq2wC2WES2pOQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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