Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2c415a893eed1add6a5cbb353355e168d454ff73ee0233736a38d82aea6e128' 
  AND token = 'OLOG9kmHvBuUjl2qocrFpFOXTMB8Pl5r3Dg2ISu810s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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