Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f59b60398fb8ec42f28bf5c40f8be6c5d76e18c489c47319d81566a00394e19b' 
  AND token = 'j3PcLhKdhjtWMPD03W6cPk3gMRY/0I0KDx2uhQ/GSB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}