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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '056c9934b337b5e24a421a135e8aac4f3031e17a803bda771c90181791fd7001' 
  AND token = 'z/tw3K17w9x5C06C3a/yQNjbF9jfuEUt/PLJ8T6FPic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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