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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9bea5dbc40d50308f3c71338a49ce420e9eb03fae03067fd1536b8c807ac63a3' 
  AND token = 'elYRfA8eDo+6rAd2/G4z05UpG05Hynv4qKu1I4LlMkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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