Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f2d93dce6c65141a175d47e6cf7d6a74a02faa5111eb859949c32ac8c967263' 
  AND token = 'AJA3fG+nMROGhqiFXNlfYLlr6WEkkYkzVkF7Q8pfEZA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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