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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '870935a9d93bcf72b8cc11efc4cc4d0148545305883cbe1c13d5b750f8a6c386' 
  AND token = 'bo7WCGgF1In8l4slCF5GobWodLcRUCH9rvKX7E7Xp3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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