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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a869a95e45ab1aa34cdd7c8133964a4f0a4d69c90744153a0115d2dfa27d09c9' 
  AND token = '32muub86HrkYs5KRoi20ampOdXFd7K/E8V4gtIJEgdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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