Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9e06afada5ac3fd74fd6579e02bd001bccf40f35abeab7e4c8fdd84ed97f3719' 
  AND token = '7i2GrlXup+LVWPhiyl6m/P4/hn1ZNaWgvK4MdfMh/cQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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