Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36c25f6f0a61946a7dd617f54612530d434ff5216314dc58f29bbbb2dc094339' 
  AND token = 'aawrRnQxvtx/UJ9wHz6Y4a4FXPqG1zJNf3cGYgfkM2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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