Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ea68c0dba745eb5fcb037fb5ef972a6ffdaf31788c9784f6eb6a71f497691a27' 
  AND token = 'gJz99Dl0fU6HZysiwj7uHHt3PyFgFP3WSoaSVtSW9n4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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