Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0918a8f64158102bef6d14285ee155a539988d1809a2942a6126dc39731e842c' 
  AND token = '3Jnqm2pN2+V+BwkaWNZ0pTL2UrxozEE9Or4PYzkSfB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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