Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'adb59fa8645e243090b3e593463e0a15b3ae008a979721069850a97197f74b5f' 
  AND token = 'lYWzEg+spaVNXMA5CXbjcm2OVElOyMzBjoAXbQ1jMVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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