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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fd8d7bddd18279e3b6e6eb079c5c77100c9c067581c79a9efd2fcb8df405757a' 
  AND token = 'd2wi9wkkIFLXgETOxXX0+Id8X8JYhLArDxFqQPn7y38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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