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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e041398848c15f1158b7376e91d70775fc2522e35497376b338ffe6a39ff3003' 
  AND token = 'QSnyKa9ZXwbG0DiqUs8P7kmrtu362/wxsh5V1/frNQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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