Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f6a5eeb07c9639aeac4647280094a9e808fc0fc1ab49b95af39f3937f82bc6b' 
  AND token = 'mG4gVGRGhFUPR0hkRqCokhAmAu6fvXsNQzkbG7BXVDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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