Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31738737bb85534180085a0c9a2bcd49fc492190f5aee71bc5e33cb3499f499f' 
  AND token = 't8huJCrgp9yxt9MnFrhnICUI3V4oJrYVbbSf9cOtTv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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