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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '036b363e23670fbf9796c37343139879a746150978d5fa3c586eee1d1ab03f4a' 
  AND token = 'G0/EsKSSJKn3HYD0n8aUc9uIEoKV88Ps3BQAfxXgJ2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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