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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '94bd0b11acdb13b6db0edbaba05c7b77398d74bde75a0b72aa043d896f7bcf84' 
  AND token = 'qLLQjT1F4gmhhe4e8dZm14SMvVm7DLAqKBqOZMSrJ6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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