Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4dec5351d526c46a1ee1f868584d8b12b798af391a5a6b51f7cc32eed5997b98' 
  AND token = 'BU6a0Emj28s3fDi4wLRSfdhYOWItGBw6clvm8WMgTxQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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