Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cefd40c4327e69048d637683db812e6e0ca0c6a208e124d62c5292e789241f2d' 
  AND token = 'g2C3IEyyKMfouAhD3K8B3OzhCDNOZdrTmvSjVM5DGaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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