SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1617b885b21a3b41791bfebbfe4422e4bd4be2c0323d05ff7586dc6dca42ab76' 
  AND token = '88qs6+j6XJ0VKtYUawFrCaq+At6fLXL1OR/BfL9Xhos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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