Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c0010c2caf08e3f8b512549f31c309d04d5766e73c7d62f7c7a3ca125678caa' 
  AND token = 'JCYzKjcPNTFfeBPpeSB63V4Nwn1ciZdkY+GdJ64ewto=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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