Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e84e69969d2677c5ddee2b65a701f9a3162f2b07f747c06fdc2fd9c88822eff' 
  AND token = 'igSgkifW2zhQjfWAmBuFLD4igMHF670zM2WK4BLoDJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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