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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25b11ae5673066f1f8791d33c3fa0056352e7b7dbbef34a6dda60562f0d9382f' 
  AND token = 'wFAXDhZckjnFRevsCKY2uPnffqdhfONXCrMwBRAulyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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