Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bb88742c524aed4e4517eab5fa7b183603fa617ef7f4b61e8710bcc586b1f9f' 
  AND token = 'u4N0yM+1xM+4ucOepechnXMyPoNIvh3EUmxN3Qskpcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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