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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5b46227362f466088937cf63ee9b78a73d249f5ae8b8b659265d2ea5d33ef32c' 
  AND token = '36wiKLW/PTIvfdqJgJATLLDyR30atobHsPN3hNwIySA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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