Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14f2fa28e1745b6a6e98d1f58173f16126ec092e55d4242a8a781b14d21473da' 
  AND token = 'QW12ktZ3sbQGY+474QX0Ekfjc2XIETxTnpilvJD3BfY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}