Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b7e02ffdd6323cfd191e5cb976dd32e367c777a384cb2e1e7694c1cdde8780c5' 
  AND token = 'sNLvnKJBtVVy6qITK9bPcs5i2BWKTSFC2iRzDH9xkNk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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