Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb97430ba5c14bef91cac9076a5e58823b3d781dbda79e86bfbb5ea7ba6b0bee' 
  AND token = 'h3wi2oX6FvVTJkBwbamfUIza/8a1EPwdakmtR1X1504=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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