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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2ba14c28d9a9f08756c662d71ea6e122557ba316f7c105445954b6e0228adab1' 
  AND token = 'p4HOJmyFWif53wp31MayoPrPT3fbYsxaZH2FVck3S3Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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