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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db30c97d9f0fadc17fa8ab07012d7295cb7cd7ceccc1a727b9f18b5542f9cf0f' 
  AND token = 'UJsJ/woaWVL7cCNA2JV0EIEC/wjo1h39mT9Y5jq5Gms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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