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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e6de35442dcdcb39d7a5dc047ab0cd0f54f81a642bdd1c604cb89ffc112bf6c6' 
  AND token = '0DF+ois4wdjryGHIFxwBHaebXKZ5O6I+OC8COn/xB9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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