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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63a719dde20a9175c4a6d95d0d364ab44db861f5b4208f8df1b6bdc232fbd076' 
  AND token = 'N4Suw+oOFUiAKvYb8fx5I8PGuKeR7TxI3/Cc/+ESUpk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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